ABAP Select data from SAP table EINV_TRIG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EINV_TRIG table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to EINV_TRIG. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the EINV_TRIG table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_EINV_TRIG TYPE STANDARD TABLE OF EINV_TRIG,
      WA_EINV_TRIG TYPE EINV_TRIG,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <EINV_TRIG> TYPE EINV_TRIG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_EINV_TRIG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EINV_TRIG
  INTO TABLE IT_EINV_TRIG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EINV_TRIG
*  INTO TABLE @DATA(IT_EINV_TRIG2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_EINV_TRIG INDEX 1 INTO DATA(WA_EINV_TRIG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EINV_TRIG ASSIGNING <EINV_TRIG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EINV_TRIG>-SRCDOCCAT = 1.
<EINV_TRIG>-SRCDOCNO = 1.
<EINV_TRIG>-SRCDOCTYPE = 1.
<EINV_TRIG>-LOG_SYSTEM = 1.
<EINV_TRIG>-APPLK = 1.

ENDLOOP.

LOOP AT IT_EINV_TRIG INTO WA_EINV_TRIG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EINV_TRIG-SRCPROCESS, sy-vline,
  WA_EINV_TRIG-SRCPROC_REF, sy-vline,
  WA_EINV_TRIG-TECHDOCTYPE, sy-vline,
  WA_EINV_TRIG-TARGPROCESS, sy-vline,
  WA_EINV_TRIG-BUKRS, sy-vline,
  WA_EINV_TRIG-GPART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EINV_TRIG you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_EINV_TRIG TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_EINV_TRIG INTO WA_EINV_TRIG.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field SRCDOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-SRCDOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-SRCDOCNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOG_SYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-LOG_SYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-LOG_SYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART_SEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-GPART_SEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-GPART_SEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT_SEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-VKONT_SEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-VKONT_SEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART_SRCDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-GPART_SRCDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-GPART_SRCDOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT_SRCDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-VKONT_SRCDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-VKONT_SRCDOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWVK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-ABWVK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-ABWVK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EINV_TRIG-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EINV_TRIG-VTREF.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EINV_TRIG_STR, 
SRCDOCCAT TYPE STRING,
SRCDOCNO TYPE STRING,
SRCDOCTYPE TYPE STRING,
LOG_SYSTEM TYPE STRING,
APPLK TYPE STRING,
SRCPROCESS TYPE STRING,
SRCPROC_REF TYPE STRING,
TECHDOCTYPE TYPE STRING,
TARGPROCESS TYPE STRING,
BUKRS TYPE STRING,
GPART TYPE STRING,
GPART_SEL TYPE STRING,
VKONT TYPE STRING,
VKONT_SEL TYPE STRING,
MDCAT TYPE STRING,
GPART_SRCDOC TYPE STRING,
VKONT_SRCDOC TYPE STRING,
ABWVK TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
BUPLA TYPE STRING,
SPART TYPE STRING,
WAERS TYPE STRING,
SRCDOC_AMOUNT TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
INV_CATEGORY TYPE STRING,
CORRCAT TYPE STRING,
PTSRL TYPE STRING,
SEPARATE_INV TYPE STRING,
INVOICE_BASEDATE TYPE STRING,
INVOICE_FIRST TYPE STRING,
FAEDN_SEL TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
SRCDOC_CRDATE TYPE STRING,
RECNUM TYPE STRING,
KEYPP TYPE STRING,
ARCHIVED TYPE STRING,
INVDOCNO_OLD TYPE STRING,
INVTRIGLOCK TYPE STRING,
SIMULATED TYPE STRING,
BEL_ART TYPE STRING,
PORTION TYPE STRING,
ABRVORG TYPE STRING,
MANOUTSORT TYPE STRING,
TOBRELEASD TYPE STRING,
ISU2CI_CATEGORY TYPE STRING,
TRIG_DBTAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EINV_TRIG_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_EINV_TRIG_STR-SRCDOCCAT sy-vline 
WA_EINV_TRIG_STR-SRCDOCNO sy-vline 
WA_EINV_TRIG_STR-SRCDOCTYPE sy-vline 
WA_EINV_TRIG_STR-LOG_SYSTEM sy-vline 
WA_EINV_TRIG_STR-APPLK sy-vline 
WA_EINV_TRIG_STR-SRCPROCESS sy-vline 
WA_EINV_TRIG_STR-SRCPROC_REF sy-vline 
WA_EINV_TRIG_STR-TECHDOCTYPE sy-vline 
WA_EINV_TRIG_STR-TARGPROCESS sy-vline 
WA_EINV_TRIG_STR-BUKRS sy-vline 
WA_EINV_TRIG_STR-GPART sy-vline 
WA_EINV_TRIG_STR-GPART_SEL sy-vline 
WA_EINV_TRIG_STR-VKONT sy-vline 
WA_EINV_TRIG_STR-VKONT_SEL sy-vline 
WA_EINV_TRIG_STR-MDCAT sy-vline 
WA_EINV_TRIG_STR-GPART_SRCDOC sy-vline 
WA_EINV_TRIG_STR-VKONT_SRCDOC sy-vline 
WA_EINV_TRIG_STR-ABWVK sy-vline 
WA_EINV_TRIG_STR-VTREF sy-vline 
WA_EINV_TRIG_STR-SUBAP sy-vline 
WA_EINV_TRIG_STR-BUPLA sy-vline 
WA_EINV_TRIG_STR-SPART sy-vline 
WA_EINV_TRIG_STR-WAERS sy-vline 
WA_EINV_TRIG_STR-SRCDOC_AMOUNT sy-vline 
WA_EINV_TRIG_STR-DATE_FROM sy-vline 
WA_EINV_TRIG_STR-DATE_TO sy-vline 
WA_EINV_TRIG_STR-INV_CATEGORY sy-vline 
WA_EINV_TRIG_STR-CORRCAT sy-vline 
WA_EINV_TRIG_STR-PTSRL sy-vline 
WA_EINV_TRIG_STR-SEPARATE_INV sy-vline 
WA_EINV_TRIG_STR-INVOICE_BASEDATE sy-vline 
WA_EINV_TRIG_STR-INVOICE_FIRST sy-vline 
WA_EINV_TRIG_STR-FAEDN_SEL sy-vline 
WA_EINV_TRIG_STR-CRNAME sy-vline 
WA_EINV_TRIG_STR-CRDATE sy-vline 
WA_EINV_TRIG_STR-SRCDOC_CRDATE sy-vline 
WA_EINV_TRIG_STR-RECNUM sy-vline 
WA_EINV_TRIG_STR-KEYPP sy-vline 
WA_EINV_TRIG_STR-ARCHIVED sy-vline 
WA_EINV_TRIG_STR-INVDOCNO_OLD sy-vline 
WA_EINV_TRIG_STR-INVTRIGLOCK sy-vline 
WA_EINV_TRIG_STR-SIMULATED sy-vline 
WA_EINV_TRIG_STR-BEL_ART sy-vline 
WA_EINV_TRIG_STR-PORTION sy-vline 
WA_EINV_TRIG_STR-ABRVORG sy-vline 
WA_EINV_TRIG_STR-MANOUTSORT sy-vline 
WA_EINV_TRIG_STR-TOBRELEASD sy-vline 
WA_EINV_TRIG_STR-ISU2CI_CATEGORY sy-vline 
WA_EINV_TRIG_STR-TRIG_DBTAB sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.